Method “rel_length” in Neo4j.rb doesn't work.

问题

I need to get "friends of friends" of User. So, friend(rel_length: 2) doesn't work (ignores method), returning friends.

class User
  include Neo4j::ActiveNode
  ...
  has_many :out, :friend, rel_class: Friend
  ...
end

class Friend
  include Neo4j::ActiveRel
  from_class User
  to_class User
  type 'friend'

  property :activity, type: String
  property :relation, type: String
  property :token, type: String
end

回答1:

For anybody finding this later the reason was because he was using an older version of the gem (see the comments)

来源：https://stackoverflow.com/questions/35192885/method-rel-length-in-neo4j-rb-doesnt-work